"I've actually been to a Super Bowl that the Steelers won, and I've been to a Steelers after-party, after Super Bowl 43, when we beat the Cardinals," Manganiello told ET’s Sophie Schillaci at a Sony Pictures event celebrating his new movie, Smurfs: The Lost Village, arriving in theaters on April 17. "I'm hoping that we just keep the parties going."

Despite his faith in the Steelers, Manganiello won't be taking any bets on the NFL playoffs game -- especially with Ben Affleck, who happens to be a Boston native and dedicated Patriots fan.

They may not be gambling with each other on the big game, but Manganiello and Affleck will go head-to-head in the upcoming solo Batman flick, in which Affleck's Dark Knight will face Manganiello's villain, Deathstroke. Affleck will also direct the movie.

"Growing up an avid comic book fan, and then there were a lot of superhero roles, and supervillain roles, that came my way that I said no to, or wasn't allowed to do, because of other commitments," Manganiello said of landing the role. "It's just really exciting to think that this is the one."

And the fans seem to be satisfied with Manganiello taking on the DC Comics character.

"I'm glad everybody's happy," he pointed out. "I'm just gonna put my head down and just really show up as prepared as any supervillain ever has."